Synonyms and related words :
bare necessities, blackmail, call, call for, claim, condition, contribution, demand, demand for, desideration, desideratum, draft, drain, duty, essential, essentials, exaction, extortion, extortionate demand, heavy demand, imposition, impost, indent, indispensable, insistent demand, levy, must, must item, necessaries, necessities, necessity, need, need for, nonnegotiable demand, notice, occasion, order, precondition, prerequirement, prerequisite, provision, proviso, qualification, requisite, requisition, rush, rush order, sine qua non, stipulation, tax, taxing, the necessary, the needful, tribute, ultimatum, want, warning